I know, I read it but in the movie, Dr. Brand said Edmund was the planet they had to choose because she was talking about the planet being far enough away from Gargantua not to have too much tidal force, May notice that the ambient light on Edmund is the same as on Earth (yes I know, the scenes are turned on Earth), a neutron star will instead put a blue light I think.
Also Gargantua is in another galaxy.
I also say that when they are towards the black hole, it is fast to reach the center from Mann (I avoid too much spoil) so for me, the black hole is not very big but after I do not know what is the speed of the vessel, also they cut off the ends to avoid doing too long and also it diluating time.
Question off-topic : The wormhole work and don't work ?
